diff --git a/controller/Notebooks.py b/controller/Notebooks.py
index 1cd7a09..215a93f 100644
--- a/controller/Notebooks.py
+++ b/controller/Notebooks.py
@@ -672,9 +672,12 @@ class Notebooks( object ):
     contents = Valid_string( min = 1, max = 50000, escape_html = False ),
     startup = Valid_bool(),
     previous_revision = Valid_revision( none_okay = True ),
+    position_after = Valid_id( none_okay = True ),
+    position_before = Valid_id( none_okay = True ),
     user_id = Valid_id( none_okay = True ),
   )
-  def save_note( self, notebook_id, note_id, contents, startup, previous_revision, user_id ):
+  def save_note( self, notebook_id, note_id, contents, startup, previous_revision = None,
+                 position_after = None, position_before = None, user_id = None ):
     """
     Save a new revision of the given note. This function will work both for creating a new note and
     for updating an existing note. If the note exists and the given contents are identical to the
@@ -692,6 +695,10 @@ class Notebooks( object ):
     @type previous_revision: unicode or NoneType
     @param previous_revision: previous known revision timestamp of the provided note, or None if
       the note is new
+    @type position_after: unicode or NoneType
+    @param position_after: id of note to position the saved note after (optional)
+    @type position_before: unicode or NoneType
+    @param position_before: id of note to position the saved note before (optional)
     @type user_id: unicode or NoneType
     @param user_id: id of current logged-in user (if any), determined by @grab_user_id
     @rtype: json dict
@@ -699,7 +706,7 @@ class Notebooks( object ):
       'new_revision': User_revision of saved note, or None if nothing was saved
       'previous_revision': User_revision immediately before new_revision, or None if the note is new
       'storage_bytes': current storage usage by user
-      'rank': integer rank of the saved note, or None
+      'rank': float rank of the saved note, or None
     }
     @raise Access_error: the current user doesn't have access to the given notebook
     @raise Validation_error: one of the arguments is invalid
@@ -717,22 +724,35 @@ class Notebooks( object ):
     if notebook.read_write == Notebook.READ_WRITE_FOR_OWN_NOTES:
       startup = True
 
+    def calculate_rank( position_after, position_before ):
+      after_note = position_after and self.__database.load( Note, position_after ) or None
+      before_note = position_before and self.__database.load( Note, position_before ) or None
+
+      if after_note and before_note:
+        return ( float( after_note.rank ) + float( before_note.rank ) ) / 2.0
+      elif after_note:
+        return float( after_note.rank ) + 1.0
+      elif before_note:
+        return max( float( before_note.rank ) - 1.0, 0.0 )
+      return 0.0
+
     # check whether the provided note contents have been changed since the previous revision
     def update_note( current_notebook, old_note, startup, user ):
       # the note hasn't been changed, so bail without updating it
-      if contents.replace( u"\n", u"" ) == old_note.contents.replace( u"\n", "" ) and startup == old_note.startup:
+      if not position_after and not position_before and startup == old_note.startup and \
+         contents.replace( u"\n", u"" ) == old_note.contents.replace( u"\n", "" ):
         new_revision = None
       # the note has changed, so update it
       else:
         note.contents = contents
         note.startup = startup
-        if startup:
-          if note.rank is None:
-            note.rank = self.__database.select_one( float, notebook.sql_highest_note_rank() ) + 1
-        else:
-          note.rank = None
-        note.user_id = user.object_id
 
+        if position_after or position_before:
+          note.rank = calculate_rank( position_after, position_before )
+        elif note.rank is None:
+          note.rank = self.__database.select_one( float, notebook.sql_highest_note_rank() ) + 1
+
+        note.user_id = user.object_id
         new_revision = User_revision( note.revision, note.user_id, user.username )
 
         self.__files.purge_unused( note )
@@ -760,10 +780,10 @@ class Notebooks( object ):
       new_revision = update_note( notebook, old_note, startup, user )
     # otherwise, create a new note
     else:
-      if startup:
-        rank = self.__database.select_one( float, notebook.sql_highest_note_rank() ) + 1
+      if position_after or position_before:
+        note.rank = calculate_rank( position_after, position_before )
       else:
-        rank = None
+        rank = self.__database.select_one( float, notebook.sql_highest_note_rank() ) + 1
   
       previous_revision = None
       note = Note.create( note_id, contents, notebook_id = notebook.object_id, startup = startup, rank = rank, user_id = user_id )
diff --git a/controller/test/Test_notebooks.py b/controller/test/Test_notebooks.py
index 0e1dfd6..31b4796 100644
--- a/controller/test/Test_notebooks.py
+++ b/controller/test/Test_notebooks.py
@@ -1105,6 +1105,7 @@ class Test_notebooks( Test_controller ):
       notebook_id = self.notebook.object_id,
       note_id = self.note.object_id,
       contents = new_note_contents,
+      startup = False,
     ), session_id = self.session_id )
 
     # load the note by the old revision
@@ -1122,7 +1123,7 @@ class Test_notebooks( Test_controller ):
     assert note.title == previous_title
     assert note.contents == previous_contents
     user = self.database.load( User, self.user.object_id )
-    assert user.storage_bytes == 0
+    assert user.storage_bytes > 0
 
   def test_load_note_with_previous_revision( self ):
     self.login()
@@ -1730,11 +1731,7 @@ class Test_notebooks( Test_controller ):
     user = self.database.load( User, self.user.object_id )
     assert user.storage_bytes > 0
     assert result[ "storage_bytes" ] == user.storage_bytes
-
-    if startup:
-      assert result[ "rank" ] == 0.0
-    else:
-      assert result[ "rank" ] is None
+    assert result[ "rank" ] == 0.0
 
     # make sure the old title can no longer be loaded
     result = self.http_post( "/notebooks/load_note_by_title/", dict(
@@ -1758,11 +1755,7 @@ class Test_notebooks( Test_controller ):
     assert note.contents == new_note_contents
     assert note.startup == startup
     assert note.user_id == self.user.object_id
-
-    if startup:
-      assert note.rank == 0.0 
-    else:
-      assert note.rank is None
+    assert note.rank == 0.0 
 
     # make sure that the correct revisions are returned and are in chronological order
     result = self.http_post( "/notebooks/load_note_revisions/", dict(
@@ -1872,7 +1865,7 @@ class Test_notebooks( Test_controller ):
     assert result[ "previous_revision" ].revision == previous_revision
     assert result[ "previous_revision" ].user_id == self.user.object_id
     assert result[ "previous_revision" ].username == self.username
-    assert result[ "rank" ] is None
+    assert result[ "rank" ] == 0.0
 
     self.login()
 
@@ -1898,11 +1891,7 @@ class Test_notebooks( Test_controller ):
     assert note.contents == new_note_contents
     assert note.startup == startup
     assert note.user_id == self.user2.object_id
-
-    if startup:
-      assert note.rank == 0.0 
-    else:
-      assert note.rank is None
+    assert note.rank == 0.0 
 
     # make sure that the correct revisions are returned and are in chronological order
     result = self.http_post( "/notebooks/load_note_revisions/", dict(
@@ -2004,7 +1993,7 @@ class Test_notebooks( Test_controller ):
     user = self.database.load( User, self.user.object_id )
     assert user.storage_bytes > 0
     assert result[ "storage_bytes" ] == user.storage_bytes
-    assert result[ "rank" ] is None
+    assert result[ "rank" ] == 0.0
 
     # make sure the old title can no longer be loaded
     result = self.http_post( "/notebooks/load_note_by_title/", dict(
@@ -2028,11 +2017,7 @@ class Test_notebooks( Test_controller ):
     assert note.contents == new_note_contents.replace( u"<span>", "" )
     assert note.startup == startup
     assert note.user_id == self.user.object_id
-
-    if startup:
-      assert note.rank == 0.0 
-    else:
-      assert note.rank is None
+    assert note.rank == 0.0 
 
     # make sure that the correct revisions are returned and are in chronological order
     result = self.http_post( "/notebooks/load_note_revisions/", dict(
@@ -2081,7 +2066,7 @@ class Test_notebooks( Test_controller ):
     user = self.database.load( User, self.user.object_id )
     assert user.storage_bytes > 0
     assert result[ "storage_bytes" ] == user.storage_bytes
-    assert result[ "rank" ] is None
+    assert result[ "rank" ] == 0.0
 
     # make sure the old title can no longer be loaded
     result = self.http_post( "/notebooks/load_note_by_title/", dict(
@@ -2155,7 +2140,7 @@ class Test_notebooks( Test_controller ):
     user = self.database.load( User, self.user.object_id )
     assert user.storage_bytes == previous_storage_bytes
     assert result[ "storage_bytes" ] == 0
-    assert result[ "rank" ] is None
+    assert result[ "rank" ] == 0.0
 
     result = self.http_post( "/notebooks/load_note_by_title/", dict(
       notebook_id = self.notebook.object_id,
@@ -2209,7 +2194,7 @@ class Test_notebooks( Test_controller ):
     user = self.database.load( User, self.user.object_id )
     assert user.storage_bytes == previous_storage_bytes
     assert result[ "storage_bytes" ] == 0
-    assert result[ "rank" ] is None
+    assert result[ "rank" ] == 0.0
 
     result = self.http_post( "/notebooks/load_note_by_title/", dict(
       notebook_id = self.notebook.object_id,
@@ -2325,7 +2310,7 @@ class Test_notebooks( Test_controller ):
     user = self.database.load( User, self.user.object_id )
     assert user.storage_bytes == previous_storage_bytes
     assert result[ "storage_bytes" ] == 0
-    assert result[ "rank" ] is None
+    assert result[ "rank" ] == 0.0
 
     result = self.http_post( "/notebooks/load_note_by_title/", dict(
       notebook_id = self.notebook.object_id,
@@ -2377,7 +2362,7 @@ class Test_notebooks( Test_controller ):
     user = self.database.load( User, self.user.object_id )
     assert user.storage_bytes > 0
     assert result[ "storage_bytes" ] == user.storage_bytes
-    assert result[ "rank" ] is None
+    assert result[ "rank" ] == 0.0
 
     # make sure the first title can no longer be loaded
     result = self.http_post( "/notebooks/load_note_by_title/", dict(
@@ -2450,11 +2435,7 @@ class Test_notebooks( Test_controller ):
     user = self.database.load( User, self.user.object_id )
     assert user.storage_bytes > 0
     assert result[ "storage_bytes" ] == user.storage_bytes
-
-    if startup:
-      assert result[ "rank" ] == 0.0
-    else:
-      assert result[ "rank" ] is None
+    assert result[ "rank" ] == 0.0
 
     # make sure the new title is now loadable
     result = self.http_post( "/notebooks/load_note_by_title/", dict(
@@ -2469,11 +2450,7 @@ class Test_notebooks( Test_controller ):
     assert note.contents == new_note.contents
     assert note.startup == startup
     assert note.user_id == self.user.object_id
-
-    if startup:
-      assert note.rank == 0.0 
-    else:
-      assert note.rank is None
+    assert note.rank == 0.0 
 
   def test_save_new_startup_note( self ):
     self.test_save_new_note( startup = True )
@@ -2547,7 +2524,7 @@ class Test_notebooks( Test_controller ):
     user = self.database.load( User, self.user.object_id )
     assert user.storage_bytes > 0
     assert result[ "storage_bytes" ] == user.storage_bytes
-    assert result[ "rank" ] == None
+    assert result[ "rank" ] == 0.0
 
     # make sure the new title is now loadable
     result = self.http_post( "/notebooks/load_note_by_title/", dict(
@@ -2588,7 +2565,7 @@ class Test_notebooks( Test_controller ):
     user = self.database.load( User, self.user.object_id )
     assert user.storage_bytes > 0
     assert result[ "storage_bytes" ] == user.storage_bytes
-    assert result[ "rank" ] == None
+    assert result[ "rank" ] == 0.0
 
     # make sure the new title is now loadable
     result = self.http_post( "/notebooks/load_note_by_title/", dict(
@@ -2639,11 +2616,7 @@ class Test_notebooks( Test_controller ):
     user = self.database.load( User, self.user.object_id )
     assert user.storage_bytes > 0
     assert result[ "storage_bytes" ] == user.storage_bytes
-
-    if startup:
-      assert result[ "rank" ] == 1.0
-    else:
-      assert result[ "rank" ] is None
+    assert result[ "rank" ] == 1.0
 
     # make sure the new title is now loadable
     result = self.http_post( "/notebooks/load_note_by_title/", dict(
@@ -2658,11 +2631,7 @@ class Test_notebooks( Test_controller ):
     assert note.contents == new_note.contents
     assert note.startup == startup
     assert note.user_id == self.user.object_id
-
-    if startup:
-      assert note.rank == 1 # one greater than the previous new note's rank 
-    else:
-      assert note.rank is None
+    assert note.rank == 1.0 # one greater than the previous new note's rank 
 
   def test_save_two_new_startup_notes( self ):
     self.test_save_two_new_notes( startup = True )
diff --git a/static/js/Editor.js b/static/js/Editor.js
index 0432eaa..3d5f9e8 100644
--- a/static/js/Editor.js
+++ b/static/js/Editor.js
@@ -848,6 +848,7 @@ Editor.prototype.drop = function( event ) {
     swapDOM( hover_drop_target, this.holder );
     removeElement( "note_drag_source_area" );
     this.highlight();
+    signal( this, "moved", this, this.previous_editor(), this.next_editor() );
   }
 
   var drop_targets = getElementsByTagAndClassName( "div", "note_drop_target" );
@@ -863,6 +864,28 @@ Editor.prototype.drop = function( event ) {
   }
 }
 
+Editor.prototype.previous_editor = function () {
+  var previous_holder = this.holder.previousSibling;
+  while ( previous_holder && previous_holder.nodeValue == "\n" )
+    previous_holder = previous_holder.previousSibling;
+  if ( !previous_holder || !hasElementClass( previous_holder, "note_holder" ) ) return null;
+  var div = getFirstElementByTagAndClassName( "div", "static_note_div", previous_holder );
+  if ( !div || !div.editor ) return null;
+
+  return div.editor;
+}
+
+Editor.prototype.next_editor = function () {
+  var next_holder = this.holder.nextSibling;
+  while ( next_holder && next_holder.nodeValue == "\n" )
+    next_holder = next_holder.nextSibling;
+  if ( !next_holder || !hasElementClass( next_holder, "note_holder" ) ) return null;
+  var div = getFirstElementByTagAndClassName( "div", "static_note_div", next_holder );
+  if ( !div || !div.editor ) return null;
+
+  return div.editor;
+}
+
 Editor.prototype.key_pressed = function ( event ) {
   signal( this, "key_pressed", this, event );
 
diff --git a/static/js/Wiki.js b/static/js/Wiki.js
index 1d09ed2..09025a9 100644
--- a/static/js/Wiki.js
+++ b/static/js/Wiki.js
@@ -849,6 +849,9 @@ Wiki.prototype.create_editor = function ( id, note_text, deleted_from_id, revisi
     connect( editor, "focused", this, "editor_focused" );
     connect( editor, "mouse_hovered", function ( target ) { self.editor_mouse_hovered( editor, target ) } );
     connect( editor, "grabber_pressed", function ( event ) { self.editor_focused( null ); } );
+    connect( editor, "moved", function ( editor, position_after, position_before ) {
+      self.editor_moved( editor, position_after, position_before );
+    } );
   }
 
   connect( editor, "load_editor", this, "load_editor" );
@@ -1038,6 +1041,10 @@ Wiki.prototype.editor_focused = function ( editor, synchronous ) {
   this.update_toolbar();
 }
 
+Wiki.prototype.editor_moved = function ( editor, position_after, position_before ) {
+  this.save_editor( editor, false, null, null, null, position_after, position_before );  
+}
+
 Wiki.prototype.make_byline = function ( username, creation, note_id ) {
   if ( username == "anonymous" )
     username = "admin";
@@ -1205,15 +1212,9 @@ Wiki.prototype.focus_previous_editor = function () {
     return;
   }
 
-  var previous_holder = this.focused_editor.holder.previousSibling;
-  while ( previous_holder && previous_holder.nodeValue == "\n" )
-    previous_holder = previous_holder.previousSibling;
-  if ( !previous_holder || !hasElementClass( previous_holder, "note_holder" ) ) return;
-  var div = getFirstElementByTagAndClassName( "div", "static_note_div", previous_holder );
-  if ( !div || !div.editor ) return;
-
+  var previous_editor = this.focused_editor.previous_editor();
   this.editor_focused( null );
-  div.editor.highlight();
+  previous_editor.highlight();
 }
 
 Wiki.prototype.focus_next_editor = function () {
@@ -1224,15 +1225,9 @@ Wiki.prototype.focus_next_editor = function () {
     return;
   }
 
-  var next_holder = this.focused_editor.holder.nextSibling;
-  while ( next_holder && next_holder.nodeValue == "\n" )
-    next_holder = next_holder.nextSibling;
-  if ( !next_holder || !hasElementClass( next_holder, "note_holder" ) ) return;
-  var div = getFirstElementByTagAndClassName( "div", "static_note_div", next_holder );
-  if ( !div || !div.editor ) return;
-
+  var next_editor = this.focused_editor.next_editor();
   this.editor_focused( null );
-  div.editor.highlight();
+  next_editor.highlight();
 }
 
 Wiki.prototype.get_toolbar_image_dir = function ( always_small ) {
@@ -1694,12 +1689,13 @@ Wiki.prototype.compare_versions = function( event, editor, previous_revision ) {
   this.load_editor( editor.title, editor.id, editor.revision, previous_revision, editor.closed ? null : editor.holder );
 }
 
-Wiki.prototype.save_editor = function ( editor, fire_and_forget, callback, synchronous, suppress_save_signal ) {
+Wiki.prototype.save_editor = function ( editor, fire_and_forget, callback, synchronous, suppress_save_signal, position_after, position_before ) {
   if ( !editor )
     editor = this.focused_editor;
 
   var self = this;
-  if ( editor && editor.read_write && !editor.empty() && !editor.closed && editor.dirty() ) {
+  if ( editor && editor.read_write && !editor.empty() && !editor.closed &&
+       ( editor.dirty() || position_after || position_before ) ) {
     editor.scrape_title();
 
     this.invoker.invoke( "/notebooks/save_note", "POST", { 
@@ -1707,7 +1703,9 @@ Wiki.prototype.save_editor = function ( editor, fire_and_forget, callback, synch
       "note_id": editor.id,
       "contents": editor.contents(),
       "startup": editor.startup,
-      "previous_revision": editor.revision ? editor.revision : "None"
+      "previous_revision": editor.revision ? editor.revision : "None",
+      "position_after": position_after ? position_after.id : "None",
+      "position_before": position_before ? position_before.id : "None"
     }, function ( result ) {
       self.update_editor_revisions( result, editor );
       self.display_storage_usage( result.storage_bytes );